Lennox LIFHC024180P431-C User Manual

14 pages

To Next Page

To Next Page

Page #1 background image

Loading...

Page #1 background image

MIDDLE STATIC PRESSURE DUCT TYPE AIR CONDITIONER

Owner’s Manual

IMPORTANT NOTE:

Read this manual carefully before

installing or operating your new air

conditioning unit. Make sure to save

this manual for future reference.

Middle Static Pressure Duct Type

Model Numbers:

LIFHC009180P431-C LIFHC012180P431-C

LIFHC018180P431-C LIFHC024180P431-C

LIFHC036180P431-C LIFHC048180P431-C

LIFHC060180P431-C

Table of Contents

Questions and Answers:

A
Anne GarrettAug 8, 2025
What to do if my Lennox LIFHC024180P431-C Air Conditioner does not turn on?
- J
  judy12Aug 8, 2025
  If your Lennox Air Conditioner doesn't turn on when you press the ON/OFF button, there are a few potential reasons. Firstly, the unit might be in its 3-minute protection mode to prevent overloading; wait three minutes after switching it off before trying again. Secondly, on cooling and heating models, if the Operation light and PRE-DEF indicators are lit, or on cooling-only models, if the 'Fan Only' indicator is lit, the outdoor temperature might be too cold, activating the unit's anti-cold wind or anti-freeze protection. In this case, wait for the outdoor temperature to increase.
R
rodney81Aug 13, 2025
Why does my Lennox Air Conditioner change from COOL mode to FAN mode?
- A
  Amber FieldsAug 13, 2025
  If your Lennox Air Conditioner changes from COOL mode to FAN mode, it could be due to two reasons. First, the unit may be preventing frost from forming; it will resume cooling once the temperature increases. Second, the set temperature might have been reached, causing the compressor to turn off; it will resume operating when the temperature fluctuates.
M
Mark MolinaAug 17, 2025
Why is my Lennox LIFHC024180P431-C Air Conditioner indoor unit making noises?
- C
  Christina WebsterAug 18, 2025
  If your Lennox Air Conditioner indoor unit makes noises, especially a squeaking sound when the system is OFF or in COOL mode, or when the drain pump is running, this is normal. Also, a squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the unit’s plastic parts; this is also normal.
T
Tina JohnsonAug 23, 2025
Why are both the indoor and outdoor units of my Lennox Air Conditioner making noises?
- E
  ethancraigAug 23, 2025
  If both the indoor and outdoor units of your Lennox Air Conditioner are making noises, specifically a low hissing sound during operation, this is normal. It's caused by refrigerant gas flowing through the units. This sound may also be heard when the system starts, stops, or is defrosting, due to the refrigerant gas stopping or changing direction.
S
Stephanie ReynoldsAug 28, 2025
Why does my Lennox Air Conditioner indoor unit emit white mist?
- W
  William JacksonAug 28, 2025
  If your Lennox Air Conditioner indoor unit emits white mist, this can occur in humid regions due to a large temperature difference between the room’s air and the conditioned air. This is a natural occurrence and requires no action.
M
Mary HansonSep 2, 2025
What to do if both the indoor and outdoor units of my Lennox Air Conditioner emit white mist?
- B
  Brittany GeorgeSep 2, 2025
  If both the indoor and outdoor units of your Lennox Air Conditioner emit white mist, this may happen when the unit restarts in HEAT mode after defrosting, due to moisture generated from the defrosting process. This is a natural occurrence, so no action is needed.

Lennox LIFHC024180P431-C Specifications

General

Voltage	208/230V
Phase	1
Refrigerant Type	R-410A
Operating Voltage	208/230 V
Cooling Capacity	24000 BTU/h

Summary

Safety Precautions

General Warnings

Key safety warnings about potential hazards and installation procedures.

General Cautions

Safety cautions regarding unit operation, maintenance, and user interaction.

Indoor Unit Parts and Major Functions

Unit Components Overview

Identification and labeling of indoor unit parts via a diagram.

Operating Conditions

Recommended temperature ranges for safe and efficient operation.

Unit Features

Details on default settings, auto-restart, louver memory, and leak detection.

Energy Saving Tips

Advice on efficient operation, including curtains and timers.

Manual Operations

Display Panel Controls

How to use the indoor unit's control panel for basic operations.

Operational Modes

Explanation of modes (AUTO, FORCED COOL, OFF) and their operations.

Care and Maintenance

Maintenance Safety Precautions

Important safety advice before performing repair or maintenance.

Routine Unit Cleaning

Steps and precautions for general cleaning and maintenance of the unit.

Air Filter Cleaning Procedure

Detailed instructions for cleaning the air filter.

Refrigerant Leak Handling

Warnings and procedures for handling refrigerant leaks.

Extended Non-Use Preparation

Instructions for maintenance before and after extended periods of inactivity.

Unit Storage Procedures

Steps to prepare the unit for storage to prevent mold and damage.

Troubleshooting

Troubleshooting Cautions

Critical warnings and actions to take before contacting a dealer.

Common Problem Identification

List of common symptoms and their possible causes.

Troubleshooting Solutions

Practical advice and solutions for common issues like poor cooling or heating.

Error Codes and Meanings

Comprehensive list of error codes, flashes, and their corresponding causes.

Disposal Guidelines

Related product manuals

Lennox LIFHC009180P431-C

Preview: Lennox LI018CI-230P432

Lennox LI018CI-230P432

Lennox LI012CI-180P432

Lennox LI036HI-180P432

Lennox LI018HO-180P432

Lennox LI036CI-180P432

Preview: Lennox LIAC024-180P431

Lennox LIAC024-180P431

Lennox LI012CO-180P432

Lennox LIAC060-180P431

Lennox LI024CI-180P432

Lennox LI009CI-160T432

Lennox LI012HI-180P432